Lock.



m Q A M G. H. KLOBUGHAR.

LOCK. APPLICATION FILED MAR. 30, 1914.

1,100,579, PatentedJune 16, 1914.

COLUMIHA PLANOGRAPH co.,wAsHm C GEORGE H. KLOBUCHAR, RATHBUN, IOWA.

LOCK.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed March 30, 1914. Serial No. 828,311.

To all whom it may concern:

Be it known that I, GEORGE E. KLOBUOHAR, a citizen of the United States,residing at Itathbun, in the county of Appanoose and State of Iowa, haveinvented certain new and useful Improvements in Locks, of which thefollowing is a specification.

This invention has for its object to provide a lock of novelconstruction which can be operated only by a special form of key, andalso to provide a lock which is strong and durable and devoid ofcomplicated parts liable to get out of order. These objects are attainedby means of a combination and arrangement of parts to be hereinafterdescribed and claimed, reference being had to the accompanying drawing,in which- Figure 1 is a front elevation of the lock, partly broken away;Fig. 2 is a face view of the lock with a portion of the casing removed;Fig. 3 is a cross-section 011 the line 33 of Fig. 2, and Fig. 4 is across-section on the line tl of Fig. 3.

Referring specifically to the drawing the casing of the lock comprisestwo plates 5 and 6, respectively, placed face to face, and securedtogether by screws or other suitable fasteners 7. In the contiguous orinner faces of the plates are matching grooves 8 forming a seat for asliding bolt 9, said seat opening through one end of the casing so thatthe bolt may be projected therefrom to enter its keeper. In thecontiguous faces of the plates are also two matching grooves 10extending at right angles to the bolt seat and opening thereinto, whichgrooves form guide-ways for sliding tumblers 11 adapted to enter notches12 in the side of the bolt for the purpose of locking the same when itis advanced into its keeper. The tumblers are spring-pressed, smallcoiled springs 13 being mounted in the guide-ways behind the tumblers topress the same forward into locking position.

In the plate 5 is a key-hole 14: and in the inner face of said plate,between the guideways 10 is a recess 15 which is intersected by thekey-hole. This recess is stepped or of different depths on oppositesides of the keyhole. In the sides of the tumblers 11 which face eachother are notches 16 adapted to be entered by the bits of the key to bepresently described. These notches are flush with the respective sidesof the recess 15. In the inner face of the plate 6, between theguideways 10, is a recess 17 to accommodate one of the key bits. Thebolt 9 has a stem 18 which extends through a slot 19 in the plate 5 andhas on the outside of the latter a knob 20, whereby the bolt may beadvanced or retracted when unlocked.

A compound key is provided for the herein described lock. The key has atubular shank 21 on one end of which is a laterally extendingfinger-piece 22, and on the other end of the shank is a bit 23 in theform of a laterally projecting finger. Intermediate its ends, the shankhas a shoulder 24: to limit the extent to which the key may be insertedinto thekey-hole 14:. In the hollow of the shank 21 is rotatably mounteda shank 25 having a. finger-piece 26 at one end and a bit 27 at theother end. The bit 27 is in advance of the bit 23.

In operation, the finger-pieces 22 and 26 are brought together, whichplaces the bits 23 and 27 in parallel position, one behind the other.The key may now be inserted into the key-hole 14, and after it hasentered the same as far as the shoulder 24; permits, the bits are spreador swung in opposite directions in the recess 15 by spreading thefinger-pieces 22 and 26. One of the bits enters the notch 16 of one ofthe tumblers 11 and the other bit enters the notch of the other tumbler.Now, upon con tinuing to spread the finger-pieces, the bits retract thetumblers, and when the latter clear the notches 12 of the bolt 9, thebolt may be retracted. When the bolt is advanced to locking position,the springs 13 shoot the tumblers 11 forward into the bolt notches uponthe latter coming in line with the tumblers. That side of the recess 15in which the bit 23 works is deeper than the side in which the bit 27works, and the regess 17 matches with the last-mentioned si e.

The lock is simple, strong and durable, and itcan be made right or lefthanded.

I claim:

1. A lock comprising a casing having a key-hole, a bolt and slidingtumblers in the casing, the tumblers working transversely of the bolt onthe same side thereof and the latter having notches to receive thetumblers, the key-hole of the casing being located between the tumblers,and a key comprising a tubular shank having a bit at one end, and ashank rotatably mounted in said tubular shank and having a bit at oneend adjacent to the first-mentioned bit,

said bits being insertible through the key hole to come between thetumblers and adapted to be spread to engage the respecof the bolt on thesame side thereof and the latter having notches to receive the tumblers,the key-hole of the casing being located between the tumblers, and a keycomprising a pair of rotatably connected shanks having each a bit at oneend, said bits being insertible. through the key-hole to come betweenthe tumblers and adapted to be spread to engage the respective tumblersto retract the same.

3. A lock comprising a casing having a key-hole, a sliding bolt andtumblers in the casing the tumblers working transversely of the bolt andthe latter having notches to receive the tumblers, the key-hole of thecasing being located between the tumblers,

and the wall of the casing having a recess into which the key-holeopens, the tumblers having side notches which are opposite each otherand in line with the aforesaid recess, and a key comprising a'pair ofrotatably connected shanks having each a bit at one end, said bits beinginsertible through the key-hole to enter the recess between thetumblers, and adapted to be spread in said recess to enter the tumblernotches and retract the tumblers.

In testimony whereof I ailix my si nature in presence of two witnesses.

GEORGE H. KLOBUCI-IAR. WVitnesses:

W. BERNs'rnIN, MAT. VIDAS.

Copies of this patent may be 'obtained for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

